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This work concludes the synthesis of CeO-CuO nanocomposite by one-pot preparation method using three different molar ratios. The resulted nanocomposite was characterized using UV-Vis, XRD, SEM, EDX and TEM and the results show that this nanocomposite was found as spherical-like nanoparticles with high purity and the average particle size is in the range of 10-20 nm.. Furthermore, this nanocomposite was used in the solar cell application as photo anode and the results showed that the efficiency increase with increase of (x) content in the (CuO)x–(CeO2)1-x.

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In this work, the effect of mixed beta and gamma radiation on the optical fiber properties was investigated, this effect has been studied for different signal frequencies which range 1–100 kHz carrying on laser beam using amplitude shift key (ASK). Single mode (SM) glass optical fiber was utilized, and exposed by (Cs-137) as radioactive point source with different low dose rates. The variation of received optical power (P r ), peak to peak voltage (Vp-p), voltage gain (A v ), and signal to noise ratio (SNR) were measured before and after irradiation. It was observed that an improvement in the received signals which propagates in optical fiber after irradiation by exposure of lower dose rates.